Support arm



FIG. 1 is a front perspective view of a support arm, showing our new design in a lower position;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a front view thereof;

FIG. 6 is a left side view thereof;

FIG. 7 is a bottom plan view thereof;

FIG. 8 is a front perspective view of the support arm, showing our new design in an upper position;

FIG. 9 is a rear perspective view thereof;

FIG. 10 is a top plan view thereof;

FIG. 11 is a right side view thereof;

FIG. 12 is a front view thereof;

FIG. 13 is a left side view thereof;

FIG. 14 is a bottom plan view thereof;

FIG. 15 is a front perspective view of the support arm, showing our new design in a horizontal position;

FIG. 16 is a rear perspective view thereof;

FIG. 17 is a top plan view thereof;

FIG. 18 is a right side view thereof;

FIG. 19 is a front view thereof;

FIG. 20 is a left side view thereof; and,

FIG. 21 is a bottom plan view thereof.

The wire frame lines shown throughout the views are intended to indicate surface contour.

The broken lines depict portions of the support arm that form no part of the claimed design. 

CLAIM The ornamental design for a support arm, as shown and described. 